package com.newwing.fenxiao.filter;

import com.newwing.fenxiao.entities.User;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class UserLoginFilter implements Filter {
	
	public void destroy() {
		
	}

	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) res;
		HttpSession session = request.getSession();
		User loginUser = null;
		if (!"".equals(session.getAttribute("loginUser"))) {
			loginUser = (User) session.getAttribute("loginUser");
		}
		if ((loginUser == null) || (loginUser.getId() == null))
			response.sendRedirect(request.getContextPath() + "/login.jsp");
		else
			chain.doFilter(request, response);
	}

	public void init(FilterConfig arg0) throws ServletException {
		
	}
	
}